Oven-door construction



Nov. 12, 1929. H. w. O'DOWD dvEN Doofi CONSTRUCTION 2 Shee ts-Sheet 1 Filed Feb. 2, .1928

INVENTOR 0M ATTORNEYS "Nov. 12, 1929; (H. w. o'bowb 1,535,652

ovm noon cousrnucnon riled'Fe .1928 2 Sheds-Sheet 2 W-OM 'MMMfATTORNEl/SJ Z; 23 I I I I INVENTOR.

Paientea'rioi z, 929 p j 1,735,652

UNITED STATES PATENT, OFFICER HENRY w. o':oow1), or JERSEY' CITY, NEW- JERSEY, ASsIGNOR TO scramiam) Gas EQUIPMENT conrona'rron, A ooaroaarronj or MARYLAND OVEN-DOOR CONSTRUCTION Application filedilebi'uary 2, 1928. Serial No 251,265.

This invention relates to door mountings jing against the door and the other end actand latching means therefor, and has paring against the door casing in'such manner ticular reference to novel ovendoor mount as to resist opening movement of the door, ings and latches for gas or electric ranges and a detachable cover plate extends over and the like. I thetrunnions, springs, and spring-sustain- In many instances, it is desirable to use ing rods whereby to protect the same fromsprings for resisting opening movements of injury and to substantially conceal them' from doors, and in order to-enhance appearances view whenthe door is opened. it is desirable that such springs, as well as the Another feature of the invention resides hinge connections, be concealed from view. in the provision of an improved latch and 60 Various arrangements have been proposed handle by means of whichthe door may be and used for this purpose, but they have conveniently swung on its hinge'mounting given rise to objections because of difficulties and locked in closed position. The arrangein manufacturing and assembling. In some ment is such that only a single movement of cases, the springs have been connected with the hand is necessary to unlatch the device 55 the hinges in such a manner that these parts and open the door, and the parts are of'simple f had to be mounted as a unit, and because of Construction and neat appearance. the tension of the spring, the labor of moun These and other objects, features and ad- 20 ing and dismounting the door has been convantages of the invention will be more readsiderable. It sometimes becomes necessary ily apparent from the following descri tion' to replace a spring because of breakage or in connection with the accompanying rawloss of temper, and to do this with the prior ings, wherein the invention has been shown art devices mentioned, it has. required the byway of illustration, andwherein. dismounting of the door. In the case of door Figure 1 is a front elevation of a cooking r mountings for ovens of cooking ranges and range embodying the invention; v r the like, the question of protection must be Fig. 2 is avertical transverse sectional 'viewtaken into consideration, since it is desirable on line 22 of Fig. 1, on a larger scale, and that the parts-be maintained in a sanitary showing the door in closed position. 0 condition, as well as protected from extreme Fig. 3 is a fragmentary top plan view of temperature changes. the improved latch and handle; 80

An important object of' the present inven- Fig. 4 is 'a' fragmentary View similar to Fi tion in its broader aspects is to provide a 2 and showing the door mounting, with the hinge mounting for doors wherein the hinge door in open position; I v

35 'pintles and counterbalance springs are in- Fig. 5 is a fragmentary horizontal sec- 7 dependently and detachably mounted with tional view online 5-5of Fig. 1 with the 85 reference to the door. More specifically, the door closed, and with parts broken away; invention contemplates a door which is Fig. 6 is a similar View with the door swingingly mounted on trunnions which exopened; and

1 tend laterally from the opposite side edges Fig. 7 is an exploded view showing the of the door and adjacent the bottom edge component parts of the door mounting in thereof on its inner side. The door is elevation. adapted-to extend into a recessed door casing Referring to the draw ngs in detail, the nwhich is suitably provided with sockets for vention has been shownas applied to a cook the reception of the. trunnions, and said ing range comprising a rectangular base 1 trunnions are secured to the door by screws supported at its corners by legs 2, only one or 'other detachable fastening elements. of which is shown. Mounted upon the base Coaxial with the trunnions are a pair .of -1 adjacent one end thereof is an oven 3 WhlOh coiled torsion springs. which are sustained by preferably includes an outer casing and an su porting rods also secured to the door. innercasing articulated together 1n spaced re- Each of'said springs has ne of its ends actm ca The re t el 9 the i ea ing '60 'ment is such that the door plates 22and 23 are spaced apart providing a heat lnsulatlon has a substantially rectangular opening 5 of slightly greater area than the cross-section of the inner casing, and at this openin the edges of the wall 4 are reinforced by a (Ioor frame 6. The inner casing comprisies upper and lower walls 7 and 8 respectively, sidewalls 9 and 10, and a back wall (not shown) all formed of relatively'thin sheet metal whereby to render the device light in weight, and at their front edges said walls 7, 8, 9, and 10 are provided with annular flanges 11 to which inner edge flanges 12 of the frame 6 are secured by screws 12 (Fig. 1) or by welding or otherwise, as desired. The frame 6 is preferably a light weight casting which fills the space between the front edges of the bounding walls of the inner casing and the edges of the opening 5 of the outer casing, permanently uniting sald stantially parallel with the front 4 of the outer casing, but in a different plane, as best shown in Figs. 2 and 5. Integral with said wall portions,14, '15, and 16 andextending forwardly therefrom through the opening 5, are continuous. wall portions 17, the lower one of which frame member 24 is substantially flush with the portions 19 of the frame-6 and carries 111-.

- said portions 17 on the top an has a shoulder 18 (Fig; 2) which seats against the front of the outer casin wall 4, while 5 side edges terminate in lateral portions 19 and edge flanges 20, also seating against said front casing wall- 4. The lower wall portion 16 of the frame 6 is wider than the portions 14 and 15, and 1s slightly curved transversely whereby to more readily accommodate the door hinge members, as will hereinafter be described.

The door is of rectangular outline corresponding with that of the door frame 6 and adapted to fit in the recess defined by the frame walls 14, 15, 16 and 17, and comprises. front and rear plates 22 and 23 of. thin sheet metal secured to a cast peripheral frame member 24; The outer surface of the body of the w'ardly extending continuous flanges 25, to which'peripheral flanges 26 of the rear plate 23 are secured. The front plate 22 may preferably be bulged outwardly by way of enhancing the appearance of the range, and has edge flanges 27 secured to the inner side of the frame-member 24 by means of screw 28 or other suitable fastening means. The arrangechamber within the door, and the edge por tions of'said rear plate 23 are adapted to abut against-the stationary wall portions 14, 15

same in proper axial alinement.

and 16 when the door is closed, whereby to l retaln heat in the oven. 1

Extending late-rally from the side edges of the door, adjacent. the loweredge thereof, there is a pair of hinge pintles or trunnions 29 pivotally received in apertures 30 in the side wall portions 17 of the fixed frame 6. 'As

best shown in Figs. 5, 6, and 7, the trunnions 29 have flattened body portions 29 which bear against lugs 31 and 32011 the frame member 24, and they are firmly held in place on the door, and independently detachable, by means of screws 33. The lugs 32 are grooved at 34 and additional lugs or ribs 35 are grooved at 36 to form sockets for the trunnionsand their body portions, whereby to maintain the to resist opening movement of the door 13, one or more COll springs are associated with the door, there being two such springs shown in the illustrated embodiment. Each spr ng 37 encircles a sustaining rod 38 having enlarged apertured ends 39 secured to lugs 40 and 41 by screws 42, and when so mounted the rods 38 and the springs 37 are in axial alinement with the trunnions 29. One end of each spring is secured as at 43 to the adjacent end 39 of its sustaining rod 38,'While the other end 44 ofthe spring extends inwardly through a suitablehole 45 in the frame wall portion 16. Said hin e members and springs are entirely concealed from View when the door is closed, yet readilyaccessible when the devlce is open, and'in'view of the fact that the hinge pintles and the springs are independently detachable, thev door can be very easily mounted and dismounted, and the springs can be adjusted or replaced without disturbing the door mounting. In order to protect the springs 37 from high temperatures when the oven is in use, and to maintain 'the same in sanitary condition, a transversely curved cover plate 47extends longitudially between the ribs 35, overlying the trunnion bodies 29*, springs 37 and associated parts, said plate being held in position by counter,-

In order a sunk-head screws 48 engaging in tapped holes 49. The plate 47 is provided with a pair of transverse slots 50 in line with the ends 44 of the springs 37, whereby the plate will be capable of movement relative to said spring 7 ends as the door is swung about its hinge members.

When it is desired to remove the door from the range, it is first swung to itsopen position,

whereupon the'cover plate 47 may be removed and then by taking out the twoscrews 33, theentire door can bedropped down and then drawn out forwardly, leaving the trunnions e29 mounted in the frame wall portions 15 if desired. Instead of -detaching both trunnions, one alone may be detached and the door removed by shifting-it endwise for the short distance, necessary to disengage the other trunnion from its bearing. This operation front of the door,and the arrangement is such that when the door is closed, asshown in Fig.

does not affect the relationship between the I doorv and springs 37, and in remounting the door it is only necessary to guide the ends 44 of the springs into the holes 45 provided for them in the frame wall 16. Similarly, the removal and replacement of either or bothof the torsion springs 37 may be carried-out without disturbing the pivotal mountingof; the door, it being necessary only to remove 7 the cover plate 47 and then detach one or both. of the supporting rods 38 by taking out the screws 42. Since the springs are under tension when the door is open, itmay be preferred to remove the door entirelyin effecting a change or adjustment of the springs, and especially-in view of the ease and. facility with which the door may be removed.

A preferred type of latch and handle is shown in Figs. 1, 2, and 3 of the drawings,

from which it will be seen that that frame member 24, adjacent its upper edge, is provided with a pair of upwardly and forwardly extending fixed arms 52 arranged inlspaced relation and preferably integral with said frame member 24. The upper ends of said arms 52 are providedwithalined apertures for the reception of screws 53-which pivotally support a handle member 54 between said arms 52. The outer endof said handle'member 54 carries a gripping portion 55 which normally is disposed below the screwsv 53,

while the inner end of said handle "member carries a latch bar 56, secured by means of screws 57. The bar 56 is longer than the width of the handle member 54, and has its ends extending beyond the sides thereof in such manner as to engage behind depending lip portions 58 of a bracket 59 mounted on the fixed frame 6. Said bracket 59 is secured to frame 6 by screws 60 which are invisble from the 2, it will be tightl held so as to preventdeakage of air past the door, into or out of the oven. The arms 52 and handle member 54 are respectively provided with shoulders 61 and 62, which limit rocking 'movement of the handle with reference to said arms.

' In opening the door, the gripping portion 55 is grasped and pulled outwardly away from'the oven. At the beginning of this movement, the handle member swings about the screws 53 until the ends of the latch bar 56 become disengaged from the lips 58 of the bracket 59. The shoulders 62 of the'handle member then come into abutting relation with the shoulders 61 of the arms 52 preventin further pivotal movement of the handle, an thereafter continued pulling force on the handle results in opening of the door.

From the foregoing it will be evident, that an improved oven doormounting and latching means has been provided, which is ofex tremely simple construction, strong and durable in service, neat in appearance, and a substanti-al advance the art. Obviously the invention is not necessarily restricted to use on oven doors, since it may be employed in other environments with equal ad'vantage,"'and as it is susceptible of numerous modifications in the details of construction and arrangement of parts. The right is herein reserved to make such changes as fall within the scope of the appended claims without departing from the spiritof the invention Having thus described my invention, what I claim is 1. In or for a gas range, an oven having a door frame, a door mounted in said, frame,- and a pair, of hinge pins or trunnions pivotally connecting the door at its opposite side edges to'the door frame, said .hin-ge pins being inaccessible when the door is closed but rendered accessible when the door is opened, and at least one of'said pins in the open position of the door being removable asan individual unit topermit the instant removal'of the door from the door frame. 1

2. In or for a gas range; an oven having a door frame, a door mounted in said frame, and a pair of hinge pins or trunnions ivotal- 1y connecting the door at its opposite side edges to the door frame, said hingepins being inaccessible when the door is closed but rendered accessible when the door is opened, and said pins being detachably connected to the doorso as to be removable therefromasindi- .vidual units in the open position of the door to permit-the instant removalof theidoor' I the latter when desired.

4. In or for a gas range, an oven having an inset door frame, a door mounted in said. frame with its front facesubstantia-lly flush with that of the frame, a pair of rotatable hinge pins or trunnions mountedon the inside of the door'at its opposite side edges and engaged in aligned bearing openings formed in the door frame, meansfor detachably connecting at least one of the hinge pins to the 'door so as to permit theinstant removal of the latter when desired, and a guard plate.

also mounted on the inside of the hinged door and movable'therewith, said plate. covering the hinge pins and removable independently thereof.

5. In or'for a gas range, anovenhaving aninset'door frame, a door mounted in said frame with its front face substantially flush with that of the frame, said door being w on the inside and at its lower edge groove atthe opposite side edges of the door and -engaged--. in ali ned bearing openings formed in the door rame, said pins in the open position of the door being freely detachable to permit the instant removal of the door, and a guard plate detachably connected to thedoor and forming a closure or cover- 7 ing, for the open side, of the door groove or channel so as thus to house the hingepins.

. 6. In or for a gas range, an oven door havinga door frame, a 'door mounted in said frame, a pair of hinge pins or trunnions pivotally connecting the door at its opposite side edges to the'door frame, atorsiornspring coaxial with .thehinge pins and having one 0 end engaged with the door and the other end engaged with the door frame to'resist opening movement of the door, and an independent detachable mounting for the torsion whereby it may be removed without disturbing the hinge pins.

sprin 7. In or for a gas range, an oven door having a door frame, a door mounted in said 4 p frame, a pair of hinge pins or trunnions pivotally connecting the door at its opposite ,30 side edges to the door frame, a torsion spr ngcoaxial with the hinge pins and having one 10. A combinationa's in claim 6, including as a further element a detachable guard plate also mounted on the inside of the 5 hinged door and movable therewith, said 4 plate covering the hinge ins and the torsion sprin and removable 1n ependently thereof.

'11. n or for a gas range, an oven having a door frame, a door mounted in said frame, a pair of hinge pins pivotall connecting the door at its opposite side e ges to the'door frame, a torsion spring arranged interme diate of the hinge pins and coaxial therewith and the other end with the door frame, said hinge pins and torsion s ring being .inac cesslble when the door is c osed but rendered and having one end engaged with the door accessible when the door is o ened, means' 4 for detachably connecting the inge pins to the inside of the door, and independent means for detachably mounting the torsion spring on the inside of the door.

In testimony whereof, I have afiixed signature hereto.

- HENRY ODOWD.

end engaged with the door and the other end,

engaged with the door frame to resist opening movement of the door, and a detachable supporting rod encircled by the torsion spring and independent of the hinge pins, whereby the supporting rod andits enclrcling spring may be removed as an independent unit and without disturbingthe hinge pins. 4

..8 In or .for a gas range, an oven door having a door frame, a door mounted in said frame, a pair of rotatable hinge pins or trunnions mounted on the inside of the door at its opposite side edges and engaged in aligned bearing openings formed iii-the door frame,

means for detachably connecting at least one of the hingepins to the' door so as to permit the instant removal 6f the latter from the door frame, a torsion spring coaxial with the 60 hinge pins and having one end engaged with-u ,the door and the other end with the door frame to resist opening "movement of 'the door, a supporting rod encircled by the tor- S1011 spring and independent of the hinge pins, and means for detachably connecting a,

said supporting rod to the inside of the door; whereby the door ma detaching the spring t erefrom,-or the spring detached without o'r'after removing the door as desired.

Q 9. The, combination as in-claim 6, characjterized by the factrthat there are two torsion sp rings,' onelarrangedadjacent each hinge be removed without pin, each spring being mounted as recited 111 I said claim.- 

